Darwinistic thinking.

I found it hard to isolate one subject of interest that could be analyzed or of interest to Darwin. The first thing that came to mind is the number of offspring or progeny that are produced by two parents. In almost all species, whether it is moths, flies, birds, and humans, the parents produce more progeny than parents. So two parents may produce six children out of which four may survive. None the less there is still an increase in the species number that may be controlled in lower species by predators or diseases. However what may this next large epidemic be for humans. Humans have no predators, and are affected less than lower species by diseases. In the past we saw a large portion of the population wiped out by epidemics such as the Black Plague, but what might this next large scale catastrophe be? This is what interested me most when i looked at the number of animals and people outside. This curiosity led me to think about how nature always seems to level out the populations of all species, because the earth can only support so much life, after which, it fails to yield enough food, disease ravages the populations, etc. There is always an evening out process, but what will the next one be? Is there any way for us to predict our future demise? Is there any way that we can continue to reproduce and have children at the rate we are at right now? These are all questions of which I do not know the answer.